February 2015 <i>GSA Today</i> Cover (IMAGE) Geological Society of America Caption This is a color-shaded relief map with simplified tectonic units of eastern Asia. Since the Late Cretaceous, lithosphere extension was induced by the subduction of the western Pacific or Philippine plate. The Dabie and Sulu orogens contain the largest ultrahigh-pressure metamorphic belt in the world as a result of the convergence between the North and South China blocks during the Late Paleozoic-Triassic. Credit Tian and Santosh, <i>GSA Today</i> Feb. 2015. Usage Restrictions Tian and Santosh, <i>GSA Today</i> Feb. 2015. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.